Ideally suited for iPod / iPhone with the 30-pin connector. You've always wondered (e) how to better use the auxiliary port in your car stereo? Indeed, a jack-jack connection requires you to significantly increase the volume and the sound is not really top. With FiiO L3 I recommend, no worries: This connection makes you keep the power of your iPod. Two drawbacks, however: the cable is very short; it is impossible to charge the player at the same time. I'm on my second FiiO L3: by dint of twisting, the product has dropped, but after almost 4 years of use. It is robust, like most FiiO products.